Casio EX-100 has a 12.0MP 1/1.7" (7.44 x 5.58 mm ) sized CMOS sensor . On the other hand, Casio Pro EX-F1 has a 6.0MP 1/1.8" (7.144 x 5.358 mm ) sized CMOS sensor . Casio EX-100's sensor provides 6MP more than Casio Pro EX-F1's sensor, which gives a significant advantage in real life. You can print your images larger or crop more freely.
On the other hand, please keep in mind that Max sensor resolution is not the only determinant of resolving power. Factors such as the optical elements, low pass filter, pixel size and sensor technology also affects the final resolution of the captured image.
Below you can see the EX-100 and Pro EX-F1 sensor size comparison.
Casio EX-100 and Casio Pro EX-F1 have almost the same sensor size so none of them has any significant advantage over other in providing control over depth of field when used with same focal length and aperture.